| Description |
Stunning observations with SPIRE FTS of Mrk 231 have shown that CO lines are very bright up to J=13-12, and there is no sign of a decline in the CO Spectral Line Energy Distribution (SLED). Our SPIRE FTS spectra show that this is a common feature of AGN type galaxies. Therefore, we propose to observe a set of 4 very high-J CO line transitions using the PACS spectrometer, for 5 of these well studied proto-typical (Ultra-)Luminous Infrared Galaxies ((U)LIRGs) and one starburst galaxy. The question of the relative role and contribution of AGN to the far-infrared luminosities of local (U)LIRG systems has long been a problem in our understanding of the evolutionary path of these objects, and as well for the interpretation of deep far-infrared surveys.
Our SPIRE FTS and our ground-based CO line observations together with the PACS observations in this program will allow us, for the first time, to complete a full CO SLED for a set of (U)LIRGs. Combining this with our models of Photon Dominated Regions (PDRs) and X-ray Dominated Regions (XDRs), we will then be able to determine the physical state of the interstellar medium and estimate the starburst/AGN contribution to the total energetics of these systems. |
| Publication |
Hidden or missing outflows in highly obscured galaxy nuclei? . Falstad N. et al. . Astronomy & Astrophysics, Volume 623, id.A29, 10 pp. . 623 . 10.1051\/0004-6361\/201834586 . 2019A&A...623A..29F ,
Far-infrared Line Spectra of Active Galaxies from the Herschel/PACS Spectrometer: The Complete Database . Fernández-Ontiveros Juan Antonio et al. . The Astrophysical Journal Supplement Series, Volume 226, Issue 2, article id. 19, 26 pp. (2016). . 226 . 10.3847\/0067-0049\/226\/2\/19 . 2016ApJS..226...19F ,
Importance of radiative pumping for the excitation of the H2O submillimeter lines in galaxies . González-Alfonso Eduardo et al. . Astronomy and Astrophysics . null . null . 2022A&A...666L...3G ,
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